2123828218 has 4 divisors (see below), whose sum is σ = 3185742330. Its totient is φ = 1061914108.

The previous prime is 2123828191. The next prime is 2123828221. The reversal of 2123828218 is 8128283212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1300539969 + 823288249 = 36063^2 + 28693^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530957053 + ... + 530957056.

Almost surely, 2^2123828218 is an apocalyptic number.

2123828218 is a deficient number, since it is larger than the sum of its proper divisors (1061914112).

2123828218 is a wasteful number, since it uses less digits than its factorization.

2123828218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061914111.

The product of its digits is 24576, while the sum is 37.

The square root of 2123828218 is about 46085.0107735693. The cubic root of 2123828218 is about 1285.4044396062.

The spelling of 2123828218 in words is "two billion, one hundred twenty-three million, eight hundred twenty-eight thousand, two hundred eighteen".